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Determine the number of distinct subsets for A = {8,9,10,11}

There are 9 horses in a race.  In how many ways can the first three positions of the order of the finish occur? (Assume no ties.)

Find the exact area of the circle.  Round to the nearest hundredth.

Let U = {q, r, s, t, u, v, w, x, y, z}        A = {q, s, u, w, y}        B = {q, s, y, z}        C = {v, w, x, y, z} Determine 

A contractor is considering a sale that promises a profit of $35,000 with a probability of .7 or a loss (due to bad weather, strikes,….) of $4000 with a probability of .3.  What is the expected profit?

The figures below are similar.  Find the length of the side labeled x.  

Determine the probability a student prefers meat given that the student is a junior.  Round your answer to three decimal places.

A group of people are classified according to height and then random samples of people from each group are taken.  This is an example of what type of sampling?

Find the sample standard deviation of the following data set: 13, 8, 8, 18, 18, 6, 11, 10, 18

A survey of senior citizens at a doctor’s office shows that 40% take blood pressure lowering medication, 47% take cholesterol lowering medication, and 13% take both types of medication.  What is the probability that a senior citizen chosen at random either takes a blood pressure lowering or a cholesterol lowering medication?